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A102077
Denominators of e.g.f. cosec(arctanh(x)).
1
6, 12, 126, 72, 22, 252, 126, 144, 7182, 2772, 4554, 1512, 378, 84, 14322, 2464, 42, 14364, 342, 792, 1251558, 191268, 136206, 21168, 594, 1188, 33858, 1368, 1062, 257796, 128898, 576, 6407478, 17388, 295218, 948024, 79002, 158004, 89586, 14256
OFFSET
1,1
EXAMPLE
cosec(arctanh(x)) = 1/x - x/6 - 1/12*x^3/3! + 125/126x^5/5! +...
cosech(arctan(x)) = 1/x + x/6 - 1/12*x^3/3! - 125/126x^5/5! +...
MAPLE
G:=series(csc(arctanh(x)), x=0, 92): seq(denom((2*n-1)!*coeff(G, x^(2*n-1))), n=1..45); # Emeric Deutsch, Feb 25 2005
CROSSREFS
Numerators are in A102076. Probably differs from A102062.
Sequence in context: A335735 A051586 A228858 * A102062 A164584 A156432
KEYWORD
nonn,frac
AUTHOR
Ralf Stephan, Dec 31 2004
EXTENSIONS
More terms from Emeric Deutsch, Feb 25 2005
STATUS
approved